Just to summarize - I cannot go into details but we've employed methods of clickfraud, and the previous method was, well, rather stringent, and we found that the honest affiliates were sometimes losing clicks because of the extra high security. We've moved onto a different method now, but obviously there's more work to be done. Policing sucks but I guess we (in this industry) have to do it! If you want to retain your earnings you should just keep it clean - simple as that.